Simple oracle Stored Procedure example

Example of a simple oracle stored procedure -- create procedure without a parameter: drop procedure proc_testcreate or replace procedure proc_testistestvalue varchar2 (40); beginselect user_name into testvalue from user_info where user_id = 1001; values (testvalue ); end proc_test;/begin proc_test; end; -- create input parameter procedure: drop procedure success or replace procedure insert_student (user_id Number, user_name varchar2, user_pass varchar2) asbegin insert into dent stuvalues (user_id, user_name, user_pass); end insert_student; begin insert_student (1, 'aaa', 'bbb '); commit; end; drop procedure proc_test1create or replace procedure proc_test1 (invalue in Integer) astestvalue varchar2 (40); beginselect user_name into testvalue from user_info where user_id = invalue; round (testvalue); end proc_test1;/declare parameter Integer: = 1001; begin proc_test1 (parameter ); end; -- create output parameter procedure: drop procedure proc_test2create or replace procedure proc_test2 (invalue out varchar2) asbeginselect user_name into invalue from user_info where user_id = 1001; end proc_test2; /declare parameter varchar2 (20); begin proc_test2 (parameter); dbms_output.put_line (parameter); end; -- both input and output create or replace procedure proc_test3 (invalue in Integer, outvalue out varchar2) asbeginselect user_name into outvalue from user_info where user_id = invalue; end proc_test3;/Optional Integer: = 1001; parameter1 varchar2 (20); begin proc_test3 (parameter, parameter1 ); dbms_output.put_line (parameter1); end;